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SRv6 uSID Addressing Planner
Slots:
4
• Used bits:
112
• Leftover:
16
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Value labels
/48
S1
S2
16b
Locator and uSID structure
Presets
Custom
/48 locator, 64-bit block, 16-bit uSID (4 slots)
/48 locator, 80-bit block, 16-bit uSID (5 slots)
/40 locator, 64-bit block, 16-bit uSID (4 slots)
/48 locator, 64-bit block, 12-bit uSID (5 slots)
Standards mode (RFC 9602): 64/80-bit container, 16-bit uSIDs
Export descriptor
Locator address
Locator prefix
/48
uSID block bits
64
uSID length (per slot)
16
ARG bits (tail in block)
0
Slots:
4
• Used bits:
112
• Leftover:
16
/48
S1
S2
16b
Locator planning
Parent prefix (IPv6)
Target locator prefix
/48
Show count
Start index
Export CSV
Total locators:
65536
• Suggested aggregation prefix:
/48
• uSID block end if applied:
/112
0.
2001:db8:::/48
Apply
1.
2001:db8:1:::/48
Apply
2.
2001:db8:2:::/48
Apply
3.
2001:db8:3:::/48
Apply
4.
2001:db8:4:::/48
Apply
5.
2001:db8:5:::/48
Apply
6.
2001:db8:6:::/48
Apply
7.
2001:db8:7:::/48
Apply
8.
2001:db8:8:::/48
Apply
9.
2001:db8:9:::/48
Apply
10.
2001:db8:a:::/48
Apply
11.
2001:db8:b:::/48
Apply
12.
2001:db8:c:::/48
Apply
13.
2001:db8:d:::/48
Apply
14.
2001:db8:e:::/48
Apply
15.
2001:db8:f:::/48
Apply
uSID slots
16 bits
Dependent on
None
16 bits
Dependent on
None
Previous (S1)
S1
Combinations overview
Preview
Tree preview is minimal for uSID; focus is on slot structure and labels.
Compose SID preview
Input mode
Hex
Dec
S1
0
S2
0
Result
Copy
Hex groups: 2001:0DB8:1234:0000:0000:0000:0000:0000
Show SID anatomy